Folder sharing working on 10.7, but not on 10.8 ?

Hi,

Since we bought several new iMacs with 10.8, the network folders sharing is not working properly on Windows.

If I share a public folder on 10.7, it is easily reachable by a PC, however, if I share one on 10.8, it prompts me a username/password.

Are you aware of this issue ? Is it something I missed ?

Thank you very for your help.

What have you done so far to share the folder?

Here's some reference to the options you have:
http://support.apple.com/kb/PH11197?viewlocale=en_US